Roland VS-640 Printhead Test Caused Burn Smell – Now No Output

[Valerio9090]

Hello everyone,

I have a problem with my VS-640. I removed the current printhead to install another one in order to test if it was working or defective.

After installing it, I powered on the machine and got the error message: Temperature too high – 40°C. I then noticed a burning smell right away. I shut everything off, waited 10 minutes, removed the head, and reinstalled the old printhead.

When I powered it back on, the machine started up normally without any error messages.

However, when I tried to do a test print, nothing came out anymore…

Did I blow a fuse on the mainboard or on the carriage board?

Thanks best regards Gabriel

 

[Valerio9090]

Oh yes, on the defective printhead it was visible that the flat cables at the head were burned.

 

[Jim Hancock]

You need to check the fuses, output transistors and replace the burned cable, to start. And toss the old head that caused this...

 

[Valerio9090]

The head cables (flat cables) look fine. No discoloration visible.

The defective head is in the trash.

I’ll check and measure the fuses later.

Do you happen to know which ones it could be right away?

Thanks and best regards.

 

[Jim Hancock]

Oh yes, on the defective printhead it was visible that the flat cables at the head were burned.

Which cables were these? Not enough information to suggest which fuses. In these cases, you check them all, fuses and transistors.

 

[Valerio9090]

On this flat cable in the middle, two were burned. I don’t have a real photo right now.

 

[Valerio9090]

I’ll send a photo of the defective head later. You can see the burned spots there.